VPIS Phase concordance unit user manual - Universal version

This document provides operating instructions for the VPIS (Voltage Presence Indicating System) Phase Concordance Unit according to IEC 62271-206. It enables verification of phase concordance between two energised functional input units on the same panel. The document covers VPIS-V1, VPIS-V2, and VPIS-V3 versions, including compatibility information between versions, required adapters, and preliminary check procedures. It also presents a detailed table of phase concordance test results with corresponding corrective actions for different wiring configurations. Note: AI-generated document summary. Please check the original document for detailed information.